Bullet: 75 gr Banded Solids  (Barnes)

Diameter: 0.243"

 

Powder: IMR 4007 SSC (Improved Military Rifle)

Starting Powder: 43.0 gr

Max Powder: 47.0 gr

 

Primer: FED 210m

 

Case: Winchester Western

Trim Length: 2.223"

 

Cartridge Overall Length: 2.825"

 

Starting Velocity: 3,239

Starting Pressure:  

Max Velocity: 3,582

Max Pressure:  

 

The 1:12” twist originally used in .244 Remington rifles is still suitable for the 62-grain Varmint Grenade. Barnes 75-grain Banded Spitzer and 85-grain TSX bullets require the faster twists typically featured in modern rifles chambered for this cartridge.
Barrel: 24" with 1:9" twist.

 

Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/6mm-Remington.pdf